Generator power supply circuit, method and system for hybrid vehicle type and vehicle

Abstract

The invention provides a generator power supply circuit, method and system of a hybrid power vehicle and a vehicle. The generator power supply circuit of the hybrid power vehicle comprises a power battery power supply branch, an external power supply power supply branch and a controller. The controller is respectively connected with the power battery power supply branch and the external power supply branch; and the power battery power supply branch and the external power supply branch are connected with the generator. When the power battery breaks down, the power voltage input by the external power source is input to the generator through the arranged external power source power supply branch, then the generator is used for providing starting energy for the engine, and therefore the engine is started to control the vehicle to run under the condition that the power battery breaks down.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a generator power supply circuit, method, system and vehicle of a hybrid vehicle. Background Art

[0002] As vehicle usage scenarios increase, hybrid vehicles are usually equipped with generators. Generators with lower power values ​​are gradually replaced by generators with higher power values ​​due to their limited output capacity. The power battery provides the generator with starting energy to drive the engine in the vehicle. However, in actual use, the power battery may fail, and the vehicle can only stop in place and cannot be started.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a generator power supply circuit, system and vehicle for a hybrid vehicle, aiming to solve the technical problem in the prior art that the hybrid vehicle cannot be started normally when the power battery is abnormal.

[0005] To achieve the above object, the present invention proposes a generator power supply circuit for a hybrid vehicle, the generator power supply circuit for the hybrid vehicle comprising:

[0006] Power battery power supply branch, external power supply branch and controller;

[0007] The controller is connected to the power battery power supply branch and the external power supply branch respectively; the power battery power supply branch and the external power supply branch are both connected to the generator;

[0008] The controller is used to detect the battery voltage and battery power output by the power battery power supply branch, and output a conduction signal to the external power supply branch when the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range;

[0009] The external power supply branch is used to input the power supply voltage of the external power supply to the generator when receiving the conduction signal, so that the generator starts to provide starting energy for the connected engine.

[0010] Optionally, the external power supply branch includes: a charging interface and an on-off circuit;

[0011] The charging interface is respectively connected to an external power source and the on-off circuit, and the on-off circuit is respectively connected to the controller and the generator;

[0012] The controller is used to output a conduction signal to the on-off circuit when the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range;

[0013] The on-off circuit is used to conduct the connection between the charging interface and the generator when receiving the on signal, so as to input the power supply voltage transmitted through the charging interface into the generator.

[0014] Optionally, the external power supply branch further includes: a voltage conversion circuit;

[0015] The voltage conversion circuit is connected to the charging interface and the on-off circuit, and is used to convert the power supply voltage input by the external power supply through the charging interface into the working voltage required by the generator;

[0016] The on-off circuit is also used to switch on the connection between the voltage conversion circuit and the generator when receiving a switch-on signal, so as to input the working voltage into the generator.

[0017] Optionally, the external power supply branch further includes: an anti-mutation circuit;

[0018] The anti-mutation circuit is connected to the voltage conversion circuit and the on-off circuit respectively;

[0019] The anti-mutation circuit is used to stabilize the working voltage required by the generator when receiving the working voltage, so as to obtain the stabilized working voltage;

[0020] The on-off circuit is also used to conduct the connection between the anti-mutation circuit and the generator when receiving the on signal, so as to input the stabilized working voltage into the generator.

[0021] Optionally, the external power supply branch further includes: an anti-backflow circuit;

[0022] The anti-backflow circuit is respectively connected to the on-off circuit and the generator;

[0023] The anti-backflow circuit is used to prevent the power on one side of the generator from backflowing to the charging interface when the connection between the charging interface and the generator is turned on.

[0024] Optionally, the controller is also connected to the engine;

[0025] The controller is also used to detect the engine state, and when the engine state is a fault-free state, output a conduction signal to the external power supply branch.

[0026] Optionally, the controller is further configured to output a cutoff signal to disconnect the power battery power supply branch from the external power supply when detecting that the engine is in a running state;

[0027] The controller is also used to detect user instructions when the connection between the power battery power supply branch and the external power supply is disconnected, and control the vehicle operation according to the user instructions.

[0028] In addition, to achieve the above-mentioned purpose, the present invention also provides a generator power supply method for a hybrid vehicle, which is applied to a controller in a generator power supply circuit of the hybrid vehicle; the generator power supply method for a hybrid vehicle includes:

[0029] Detecting the battery voltage and battery power output by the power battery power supply branch;

[0030] When the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range, the external power supply branch is controlled to input the power supply voltage input by the external power supply to the generator, so that the generator starts to provide starting energy for the connected engine.

[0031] In addition, to achieve the above-mentioned purpose, the present invention also provides a power supply system for a hybrid vehicle, including a generator, a power battery and the generator power supply circuit of the hybrid vehicle, the power battery is connected to the generator through a power battery power supply branch in the generator power supply circuit of the hybrid vehicle, and the power battery is also used to connect to an external power supply through a power battery charging branch.

[0032] In addition, to achieve the above-mentioned purpose, the present invention also provides a vehicle, which includes: a power supply system of a hybrid vehicle.

[0033] The present invention provides a generator power supply circuit, method, system and vehicle of a hybrid vehicle. The generator power supply circuit of the hybrid vehicle includes: a power battery power supply branch, an external power supply branch and a controller; the controller is connected to the power battery power supply branch and the external power supply branch respectively; the power battery power supply branch and the external power supply branch are both connected to the generator; the controller is used to detect the battery voltage and battery power output by the power battery power supply branch, and output a conduction signal to the external power supply branch when the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range; the external power supply branch is used to input the power supply voltage input by the external power supply to the generator when receiving the conduction signal, so that the generator starts to provide starting energy for the connected engine. In the present invention, when the power battery fails, the power supply voltage input by the external power supply is input to the generator through the external power supply branch, and then the generator is used to provide starting energy for the engine, so that when the power battery fails, the engine is started to control the operation of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 A schematic structural diagram of a first embodiment of a generator power supply circuit for a hybrid vehicle proposed by the invention;

[0036] Figure 2 A first structural schematic diagram of a second embodiment of a generator power supply circuit for a hybrid vehicle proposed by the invention;

[0037] Figure 3 A second structural schematic diagram of a second embodiment of the generator power supply circuit of a hybrid vehicle proposed by the invention;

[0038] Figure 4 A third structural schematic diagram of the second embodiment of the generator power supply circuit of the hybrid vehicle proposed by the invention;

[0039] Figure 5 The circuit schematic diagram of the on-off circuit and the discharging and mutation circuit in the generator power supply circuit of the hybrid vehicle model proposed by the invention;

[0040] Figure 6 A fourth structural schematic diagram of the second embodiment of the generator power supply circuit of the hybrid vehicle proposed by the invention;

[0041] Figure 7 The present invention is a flow chart of the generator power supply method for a hybrid vehicle.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the generator power supply circuit of the hybrid vehicle according to the present invention. Figure 1 A first embodiment of a generator power supply circuit for a hybrid vehicle of the present invention is provided.

[0048] In this embodiment, the generator power supply circuit of the hybrid vehicle includes:

[0049] A power battery power supply branch 10, an external power supply branch 20 and a controller 30;

[0050] The controller 30 is connected to the power battery power supply branch 10 and the external power supply branch 20 respectively; the power battery power supply branch 10 and the external power supply branch 10 are both connected to a generator.

[0051] It is understandable that when the vehicle is in the off state, the engine in the hybrid vehicle needs the power output of the generator to start, and the generator is also in a stopped working state when the engine is off, and the power battery is required to provide energy for the generator. Once the power battery fails, the generator cannot start. Even if there is an engine drive system in the hybrid vehicle, the generator cannot provide energy to the engine, causing the engine drive system to be unable to be used normally, and the vehicle can only stay in place and cannot be used. Among them, the power battery failure may include: the power battery cannot output the battery voltage normally, the battery voltage is too low, the power battery is short-circuited, and the power battery insulation fails. When the power battery has the above-mentioned failure, the battery voltage and / or battery power output by the power battery are no longer within the voltage range and / or power range of the normal operation of the generator. For example, when there is a short circuit in the temporal part of the power battery, the battery voltage output by the power battery will not change, but the battery current will be very large, and the battery power will increase accordingly, exceeding the power required for the normal operation of the generator; for example, the power battery cannot output the battery voltage due to a failure, and the battery voltage is not within the voltage range required for the normal operation of the generator.

[0052] It should be noted that the power battery power supply branch 10 is a branch inside the vehicle that supplies power to the generator through the power battery. Considering the large power of the generator, the low-voltage battery in the vehicle cannot provide enough energy to drive the generator. The power battery power supply branch 10 mainly supplies power to the generator by outputting the energy in the power battery, thereby starting the generator. The external power supply branch 20 is another power supply branch that directly connects the generator to the external power supply. The external power supply branch 20 can use the energy input from the external power supply to drive the engine to start. The external power supply can be an external charging pile, other vehicles equipped with power batteries, household power supplies, etc. The controller 30 is a controller for controlling the process of powering the generator. The controller 30 is a controller inside the vehicle, such as a BMS controller, a vehicle domain controller, or other controllers that integrate this function.

[0053] In a specific implementation, the controller 30 can detect the battery voltage and battery power output by the power battery power supply branch 10 when the generator needs to be started; when the battery voltage is not within the preset voltage range and / or the battery power is not within the preset power range, it can be determined that the power battery cannot provide the voltage or power required by the generator, that is, the power battery has an abnormality and other internally recognized fault abnormalities. At this time, the controller 30 can output a conduction signal to the external power supply branch 20; when the external power supply branch 20 receives the conduction signal, the power supply voltage input by the external power supply can be input to the generator, so that the generator starts, and then the engine provides starting energy to start the engine. In the case of engine starting, the engine can be used to drive the vehicle. For example, in the case of a power battery failure, the battery voltage output by the power battery power supply branch 10 is zero, and the generator cannot start normally at this time; the power supply voltage provided by the external power supply is input to the generator by using the external power supply branch 20, so as to start the generator and then start the engine to provide energy for the vehicle.

[0054] Among them, the battery voltage is the voltage input from the power battery to the generator through the battery power supply branch 10. The preset voltage range is the voltage range required for the normal start of the generator. When the battery voltage provided by the power battery is not within the preset voltage range, the power battery cannot drive the generator to start. Similarly, the preset power range is the power range required for the normal start of the generator. When the battery power provided by the power battery is not within the preset power range, the power battery also cannot drive the generator to start. The conduction signal is a signal that controls the conduction of the external power supply branch 20 between the external power supply and the generator. When the external power supply branch 20 between the external power supply and the generator is conducted, the power supply voltage generated by the external power supply can provide sufficient energy for the generator to start the generator.

[0055] The present embodiment provides a generator power supply circuit of a hybrid vehicle, and the generator power supply circuit of the hybrid vehicle includes: a power battery power supply branch, an external power supply branch, and a controller; the controller is connected to the power battery power supply branch and the external power supply branch respectively; the power battery power supply branch and the external power supply branch are both connected to the generator; the controller is used to detect the battery voltage and battery power output by the power battery power supply branch, and when the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range, output a conduction signal to the external power supply branch; the external power supply branch is used to input the power supply voltage input by the external power supply to the generator when receiving the conduction signal, so that the generator starts to provide starting energy for the connected engine. In the present invention, when the power battery fails, the power supply voltage input by the external power supply branch is input to the generator through the set external power supply branch, and then the generator is used to provide starting energy for the engine, so that when the power battery fails, the engine is started to control the operation of the vehicle.

[0056] Reference Figure 2 , Figure 2 The first structural schematic diagram of the second embodiment of the generator power supply circuit of the hybrid vehicle of the present invention is provided. Based on the first embodiment of the generator power supply circuit of the hybrid vehicle of the present invention, the second embodiment of the generator power supply circuit of the hybrid vehicle of the present invention is provided.

[0057] In this embodiment, the external power supply branch 20 includes: a charging interface 201 and an on-off circuit 202; the charging interface 201 is connected to the external power supply and the on-off circuit 202 respectively, and the on-off circuit 202 is connected to the controller 30 and the generator respectively.

[0058] It should be understood that the charging interface 201 is an interface for charging the power battery inside the vehicle with an external power source. The charging interface 201 may include a fast charging interface and a slow charging interface. When the connected external power source is a charging pile, the charging gun can be connected to the fast charging interface when the charging pile is used for fast charging; similarly, when the charging pile is used for slow charging, the charging gun can be connected to the slow charging interface. In this embodiment, the charging interface 201 can be directly connected to the generator through the on-off circuit 202. The on-off circuit 202 is a circuit for controlling the on-off state between the charging interface 201 and the generator. The on-off circuit 202 may include a switch on-off device, such as a MOS tube, an IGBT, a magnetic switch, etc. The input end of the on-off circuit 202 can be connected to the charging interface 201 to receive the power supply voltage input by the external power source through the charging interface; the output end of the on-off circuit 202 is connected to the generator, and the power supply voltage can be output to the generator; the control end of the on-off circuit 202 is connected to the controller 30, and the on-off state between the charging interface 201 and the generator can be controlled according to the signal output by the controller. For example, when no on signal is received, the on-off circuit 202 may maintain the off state between the charging interface 201 and the generator.

[0059] In a specific implementation, the controller 30 can determine that a power battery failure has occurred when the battery voltage output by the power battery is not within a preset voltage range or the battery power output by the power battery is not within a preset power range, and output a conduction signal to the on-off circuit 202; the on-off circuit 202 can conduct the connection between the charging interface 201 and the generator upon receiving the conduction signal, and input the power supply voltage transmitted through the charging interface into the generator.

[0060] Furthermore, considering that the power supply voltage output by the external power supply may not match the voltage required by the generator, the power supply voltage output by the external power supply cannot directly power the generator. For example, the external power supply is a household power supply that outputs AC power, while the working voltage required by the generator is DC power; for another example, the power supply voltage output by the external power supply is too high, while the generator does not need such a high power supply voltage, or the external power supply voltage is too low and needs to be boosted.

[0061] Reference Figure 3 In order to solve the above problem, in this embodiment, the external power supply branch 20 further includes: a voltage conversion circuit 203; the voltage conversion circuit 203 is connected to the charging interface 201 and the on-off circuit 202.

[0062] It can be understood that the voltage conversion circuit 203 includes at least one function of converting AC power into DC power and adjusting the voltage value of DC power. The voltage conversion circuit 203 can be a vehicle-mounted charger or DCDC, etc. The specific structure of the voltage conversion circuit 203 needs to be determined according to the power supply voltage output by the external power supply. When the power supply voltage is an AC voltage and the voltage value of the power supply voltage is the same as the working voltage required by the generator, the voltage conversion circuit 203 can be a rectifier circuit; when the power supply voltage is a DC voltage, but the voltage value of the power supply voltage is not the same as the working voltage required by the generator, the voltage conversion circuit 203 can be a voltage value adjustment circuit such as DCDC, a transformer, etc.; of course, when the power supply voltage is an AC voltage, and the voltage value of the power supply voltage is not the same as the working voltage required by the generator, the voltage conversion circuit 203 needs to include both a rectifier circuit and a voltage value adjustment circuit. The working voltage required by the generator is the voltage required for the generator to start and run normally.

[0063] In this embodiment, when the charging interface 201 inputs the power supply voltage provided by the external power supply, the voltage conversion circuit 203 can convert the power supply voltage into the working voltage required by the generator; when the controller 30 outputs a conduction signal, the on-off circuit 202 can turn on the connection between the voltage conversion circuit 203 and the generator, and input the working voltage to the generator, thereby controlling the generator to start and run, so as to avoid the generator failing to start normally due to the mismatch between the external power supply and the working voltage required by the generator.

[0064] In addition, refer to Figure 4 In this embodiment, the external power supply branch 20 further includes: an anti-mutation circuit 204;

[0065] The anti-mutation circuit 204 is connected to the voltage conversion circuit 203 and the on-off circuit 202 respectively.

[0066] It should be understood that during the power supply process of the external power supply, the power supply voltage provided by the external power supply may be disturbed and become unstable, and then the working voltage input to the generator may also be affected and fluctuate, which may affect the operation of the generator.

[0067] It should be noted that the anti-mutation circuit 204 is a circuit for stabilizing the power supply voltage to prevent the power supply voltage or power supply current from fluctuating. The anti-mutation circuit 204 can use capacitors, voltage stabilizing chips and other structures for voltage stabilization, and can use inductors, rectifier chips, current detectors and the like.

[0068] The anti-mutation circuit is used to stabilize the working voltage and working current required by the generator when receiving the working voltage and working current, so as to obtain the stabilized working voltage and working current; when the on-off circuit 202 receives the on-signal, it turns on the connection between the anti-mutation circuit 204 and the generator, and inputs the stabilized working voltage and working current into the generator.

[0069] by Figure 5 For example, the on-off circuit 202 may include: a MOS tube Q1 and a comparator A1, and the anti-mutation circuit 204 includes a voltage regulator diode D1 and an inductor L1; wherein the input end of the MOS tube Q1 can be connected to the output end of the voltage conversion circuit 203 to receive the working voltage required by the generator. Capacitor C1 is a capacitor used to power the generator. During the power supply process, the comparator A1 can output different signals according to the voltage values ​​on both sides of the voltage conversion circuit 203 and the capacitor C1, thereby controlling the MOS tube Q1 to be turned on or off. When the MOS tube Q1 is turned on, the working voltage required by the generator can be input to the generator after being stabilized by the voltage regulator diode D1 and the current stabilized by the inductor L1. Figure 3 The structure in the figure is only an example. In actual use, the figure can be adjusted. For example, the control end of the MOS tube Q1 is directly connected to the controller 30, and the controller 30 controls the conduction state of the MOS tube Q1.

[0070] In addition, refer to Figure 6 , considering that there is usually an energy storage device on one side of the generator, such as Figure 3 In the process of supplying power to the generator through the external power supply, the energy in the energy storage device may be fed back to one end of the external power supply through the on-off circuit 202, thereby affecting the power supply of the external power supply branch 20. To this end, the external power supply branch of the present invention also includes: an anti-backfeeding circuit 205; the anti-backfeeding circuit 205 is respectively connected to the on-off circuit 202 and the generator.

[0071] It can be understood that the anti-backfeed circuit 205 is a circuit for preventing energy from one side of the generator from backfeeding to the external power supply side. The anti-backfeed circuit 205 can make the external power supply branch unidirectionally conductive, thereby avoiding affecting the normal power supply of the external power supply branch 20. The anti-backfeed circuit 205 can use a device with a unidirectional conductive function, such as a diode or other device.

[0072] In the specific power supply process, the anti-backflow circuit 205 can control the one-way conduction between the on-off circuit 202 and the generator. When the connection between the charging interface and the generator is turned on, it can effectively prevent the energy on one side of the generator from backflowing to the charging interface.

[0073] Based on the first to second embodiments of the generator power supply circuit of the hybrid vehicle type mentioned above, a third embodiment of the generator power supply circuit of the hybrid vehicle type of the present invention is proposed.

[0074] It should be noted that, in the case of a power battery failure, if you want to control the vehicle to work through the engine drive system, you also need to determine the state of the engine and the generator. In the case of an engine failure or an abnormality in the external power supply branch 20, the vehicle still cannot operate normally.

[0075] In this embodiment, the controller 30 is also connected to the engine. The controller 30 can detect the engine state and the power supply state of the external power supply branch 20, and output a conduction signal to the external power supply branch 20 when both the engine state and the external power supply branch 20 are in a fault-free state.

[0076] The controller 30 may be connected to the engine through a detection circuit or a detection structure. The engine state includes a fault state and a non-fault state. When the engine is in a fault state, the vehicle may not be started.

[0077] In this embodiment, the controller 30 can detect the engine state according to the parameters presented when the engine was last running, and then determine whether the engine is in a fault-free state.

[0078] In addition, in this embodiment, the external power supply branch 20 can directly use the components in the power battery charging branch, such as a vehicle-mounted charger, DCDC, etc. The power battery charging branch is a branch where the external power source charges the power battery. In the case of using a vehicle-mounted charger, DCDC, etc., it is necessary to further confirm whether the part of the component is faulty. Once the part of the component is faulty, it is also impossible to provide the required working voltage for the generator.

[0079] In addition, in this embodiment, after the generator normally drives the engine to start, the controller 30 can also output a cutoff signal to disconnect the power battery power supply branch 20 from the external power supply when it detects that the engine is in the running state.

[0080] It should be understood that when the external power source is connected to the charging interface 201, although the engine and the generator can be started, the vehicle still cannot drive normally. Therefore, after the engine is started normally, it is necessary to disconnect the connection between the external power supply branch 20 and the external power source to avoid the vehicle being unable to drive when connected to the charging gun.

[0081] Among them, the cut-off signal is a prompt signal, which is a signal used to prompt the user to disconnect the connection between the external power supply and the external power supply branch 20. When the user receives the cut-off signal, it indicates that the vehicle has been started normally, and the engine can provide sufficient energy for the operation of the vehicle. At this time, the connection between the charging pile and the vehicle can be disconnected. When the connection between the power battery power supply branch 20 and the external power supply is disconnected, the controller 30 detects user instructions and controls the operation of the vehicle according to the user instructions. The user instruction can be an instruction to control the movement of the vehicle, or it can be a start-up instruction to control the speakers, lights and other devices in the vehicle.

[0082] In the specific detection process, before the external power supply branch 20 establishes a connection with the external power supply, the controller 30 can detect whether the communication with the engine is lost, whether the 12V voltage normally provided by the engine is normal, whether the engine speed and torque are normal, etc. After the engine is started, it is also necessary to additionally detect whether the difference between the target speed and the actual speed of the engine is normal, whether the difference between the target torque and the actual torque is within an acceptable range, whether the clutch is stuck, etc.

[0083] In addition, before controlling the vehicle to start, it is also necessary to detect the status of the entire vehicle to determine whether the vehicle can work normally. For example, whether the generator, engine, battery and controller communicate normally to prevent the inability to obtain information and detect the status of each component; whether the generator, engine and low-voltage battery are powered normally; whether the generator and engine are allowed to be pre-charged; whether the positive and negative electrodes of the entire vehicle are melted, leaking, overloaded, etc.; whether the fast charging relay is melted; whether the high-voltage interlocking circuit of the entire vehicle is normal, etc. When the above-mentioned components of the entire vehicle are detected normally, the external power supply branch 20 can be used to power the generator.

[0084] Furthermore, to achieve the above-mentioned purpose, the present invention also provides a generator power supply method for a hybrid vehicle, which is applied to a controller in a generator power supply circuit of any of the hybrid vehicles described above. Figure 7 In the present invention, the generator power supply method of the hybrid vehicle includes:

[0085] Step S10: Detecting the battery voltage and battery power output by the power battery power supply branch.

[0086] Step S20: When the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range, control the external power supply branch to input the power supply voltage of the external power supply into the generator, so that the generator starts to provide starting energy for the connected engine.

[0087] It is understandable that when the vehicle is turned off, the engine in the hybrid vehicle needs the power output of the generator to start, and the generator is also stopped when the vehicle is turned off, and the power battery is needed to provide energy for the generator. Once the power battery fails, the generator cannot start. Even if there is an engine drive system in the hybrid vehicle, the generator cannot provide energy for the engine, causing the engine drive system to fail to work normally, and the vehicle can only stay where it is and cannot be used.

[0088] In a specific implementation, the controller can detect the battery voltage and battery power output by the power battery power supply branch when the generator needs to be started; when the battery voltage is not within the preset voltage range and / or the battery power is not within the preset power range, it can be determined that the power battery cannot provide the voltage required by the generator, that is, there is an abnormality in the power battery. At this time, the controller can output a conduction signal to the external power supply branch; when the external power supply branch receives the conduction signal, it can input the power supply voltage input by the external power supply to the generator, so that the generator starts, and then the engine provides starting energy to start the engine. In the case of engine starting, the engine can be used to drive the vehicle. For example, in the case of a power battery failure, the battery voltage output by the power battery power supply branch is zero, and the generator cannot start normally at this time; the power supply voltage provided by the external power supply is input to the generator using the external power supply branch, so as to start the generator and then start the engine to provide energy for the vehicle.

[0089] Among them, the battery voltage is the voltage input from the power battery to the generator through the battery power supply branch. The preset voltage range is the voltage range required for the normal start of the generator, and the preset power range is the power range required for the normal start of the generator. When the battery voltage is not within the preset voltage range and / or the battery power is not within the preset power range, the power battery cannot drive the generator to start. The conduction signal is a signal that controls the conduction of the external power supply branch between the external power supply and the generator. When the external power supply branch between the external power supply and the generator is conducted, the power supply voltage generated by the external power supply can provide sufficient energy for the generator to start the generator.

[0090] This embodiment provides a generator power supply method for a hybrid vehicle, the method comprising: detecting the battery voltage and battery power output by the power battery power supply branch; when the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range, controlling the external power supply branch to input the power supply voltage input by the external power supply to the generator, so that the generator starts to provide starting energy for the connected engine. In the present invention, when a power battery fails, the power supply voltage input by the external power supply branch is input to the generator through the set external power supply branch, and then the generator is used to provide starting energy for the engine, so that in the case of a power battery failure, the engine is started to control the operation of the vehicle.

[0091] In addition, other relevant control steps and processes of the generator power supply method of the hybrid vehicle model of the present invention can refer to the embodiment of the generator power supply circuit of the hybrid vehicle model mentioned above, and will not be described in detail here.

[0092] To achieve the above-mentioned purpose, the present invention also provides a power supply system for a hybrid vehicle, including a generator, a power battery and the generator power supply circuit of the hybrid vehicle, the power battery is connected to the generator through a power battery power supply branch 10 in the generator power supply circuit of the hybrid vehicle, and the power battery is also used to connect to an external power supply through a power battery charging branch.

[0093] In addition, to achieve the above-mentioned purpose, the present invention also provides a vehicle and a power supply system for a hybrid vehicle in the vehicle.

[0094] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A generator power supply circuit for a hybrid vehicle, characterized in that: The generator power supply circuit of the hybrid vehicle includes: Power battery power supply branch, external power supply branch and controller; The controller is connected to the power battery power supply branch and the external power supply branch respectively; the power battery power supply branch and the external power supply branch are both connected to the generator; The controller is used to detect the battery voltage and battery power output by the power battery power supply branch, and output a conduction signal to the external power supply branch when the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range; The external power supply branch is used to input the power supply voltage of the external power supply to the generator when receiving the conduction signal, so that the generator starts to provide starting energy for the connected engine.

2. The generator power supply circuit of the hybrid vehicle according to claim 1, characterized in that: The external power supply branch includes: a charging interface and an on-off circuit; The charging interface is respectively connected to an external power source and the on-off circuit, and the on-off circuit is respectively connected to the controller and the generator; The controller is used to output a conduction signal to the on-off circuit when the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range; The on-off circuit is used to conduct the connection between the charging interface and the generator when receiving the on signal, so as to input the power supply voltage transmitted through the charging interface into the generator.

3. The generator power supply circuit of the hybrid vehicle according to claim 2, characterized in that: The external power supply branch also includes: a voltage conversion circuit; The voltage conversion circuit is connected to the charging interface and the on-off circuit, and is used to convert the power supply voltage input by the external power supply through the charging interface into the working voltage required by the generator; The on-off circuit is also used to switch on the connection between the voltage conversion circuit and the generator when receiving a switch-on signal, so as to input the working voltage into the generator.

4. The generator power supply circuit of the hybrid vehicle according to claim 3, characterized in that: The external power supply branch also includes: an anti-mutation circuit; The anti-mutation circuit is connected to the voltage conversion circuit and the on-off circuit respectively; The anti-mutation circuit is used to stabilize the working voltage required by the generator when receiving the working voltage, so as to obtain the stabilized working voltage; The on-off circuit is also used to conduct the connection between the anti-mutation circuit and the generator when receiving the on signal, so as to input the stabilized working voltage into the generator.

5. The generator power supply circuit of the hybrid vehicle according to claim 2, characterized in that: The external power supply branch also includes: an anti-backflow circuit; The anti-backflow circuit is respectively connected to the on-off circuit and the generator; The anti-backflow circuit is used to prevent the power on one side of the generator from backflowing to the charging interface when the connection between the charging interface and the generator is turned on.

6. The generator power supply circuit of a hybrid vehicle according to any one of claims 1 to 5, characterized in that: The controller is also connected to the engine; The controller is also used to detect the engine state, and when the engine state is a fault-free state, output a conduction signal to the external power supply branch.

7. The generator power supply circuit of the hybrid vehicle according to claim 6, characterized in that: The controller is further configured to output a cut-off signal to disconnect the power battery power supply branch from the external power supply when detecting that the engine is in the running state; The controller is also used to detect user instructions when the connection between the power battery power supply branch and the external power supply is disconnected, and control the vehicle operation according to the user instructions.

8. A method for supplying power to a generator of a hybrid vehicle, characterized in that: A controller applied to a generator power supply circuit of a hybrid vehicle according to any one of claims 1 to 7; a generator power supply method of a hybrid vehicle comprising: Detecting the battery voltage and battery power output by the power battery power supply branch; When the battery voltage is not within a preset voltage range and / or the battery power is not within a preset power range, the external power supply branch is controlled to input the power supply voltage of the external power supply into the generator so that the generator starts to provide starting energy for the connected engine.

9. A power supply system for a hybrid vehicle, characterized in that: It comprises a generator, a power battery and a generator power supply circuit of a hybrid vehicle type as claimed in any one of claims 1 to 7, wherein the power battery is connected to the generator through a power battery power supply branch in the generator power supply circuit of the hybrid vehicle type, and the power battery is also used to be connected to an external power source through a power battery charging branch.

10. A vehicle, characterized in that: A power supply system for a hybrid vehicle comprising the one described in claim 9.

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